Adapting to the four seasons refers to nursed back to health according to the laws and characteristics of climate yin and yang changes throughout the year, so as to achieve the purpose of health and longevity. The changes of cold, hot and cool in spring, summer, autumn and winter are formed by the ups and downs of yin and yang in a year.
The solstice in winter brings the sun. From spring to summer, the sun grows and the yin disappears, so there is the temperature in spring and the heat in summer. It is cloudy from summer to day. From autumn to winter, the shade grows and the yang disappears, so it is cool in autumn and cold in winter.
As a part of nature, human beings can't live without objective natural conditions, but should adapt to the changes of the times to adjust the human body, so as to achieve health care purposes such as balance of yin and yang, coordination of zang-fu organs, qi and blood filling, meridian access, and good mood.
Throughout the year, it is sunny in spring and summer and cloudy in autumn and winter. Natural solar terms are also spring, summer, autumn harvest and winter storage that change with the climate change. Therefore, in spring, people should conform to nature and maintain yang; Yin Qi should also be maintained in autumn and winter, so there is a saying that "Yang is nourished in spring and summer, and Yin is nourished in autumn and winter". This requires people's spiritual activities, daily routine and five flavors of diet to be properly adjusted according to the changes of the four seasons.
In terms of work and rest time, we should "live regularly" in spring and summer and "lie down late and get up early"; "Go to bed early and get up early" in autumn; Go to bed early and get up late in winter. Among the five flavors of diet, intake should be more regular. Hunger, satiety or partial eclipse will harm the viscera and affect health, and the consumption of vegetables and fruits also has certain seasonality.